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If you have questions for the Agency that issued the current document please contact the agency directly. Official websites use .gov The list includes the threshold planning quantities (TPQs or minimum limits) for each substance. Hazardous Materials Regulations. 3. Acute inhalation toxicity5 - LC 50 is less than or equal to 100 ppm as a gas or vapor. Section 112(r) of the Clean Air Act (CAA). Table of Hazardous Materials and Special Provisions. A .gov website belongs to an official government organization in the United States. The information submitted by facilities must be made available to the public. Enhanced content is provided to the user to provide additional context. The federal list of Extremely Hazardous Substances is not a complete list of all reportable chemicals - It is merely a list of extremely toxic, volatile, or easily dispersible chemicals that are given special attention under EPCRA and must be included in the Workplace Chemical Inventory as noted in item number 3 above. April 22, 1987: Extremely Hazardous Substance (EHS) List and Threshold Planning Quantities; Emergency Planning and Release Notification Requirements; Final Rule. 13 23 60 - for employers to report fatalities and serious workplace injuries or incidents, 24 hours, 7 days. The Candidate List of substances of very high concern now contains 233 entries for chemicals that can harm people or the environment. 4. For diesel fuel (all grades combined) at a retail gas station, the threshold level is 100,000 gallons (or approximately 378,500 liters), if the tank(s) was stored entirely underground and the tank(s) was in compliance at all times during the preceding calendar year with all applicableUST requirements at 40 CFR part 280 or requirements of the State UST program approved by the Agency under 40 CFR part 281. If an accidental release of an Extremely Hazardous Substance (EHS) exceeds the applicable minimal reportable quantity, the facility must notify the State Emergency Response Commissions (SERC) and Local Emergency Planning Committee (LEPC) for any area likely to be affected by the release.